December in Chełm averages a daily high of 2.8°C with nights around -2.8°C. Expect roughly 14.3 wet days totalling 34.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Chełm is May–September.
Based on WLODAWA, PL (45.4km), 1995–2024. 19 years of December data.